Default Arguments

A default argument is a value that is automatically assigned to a formal variable, if the actual argument from the function call is omitted.

e.g.

void drawbox( int x1=1, int y1=1, int x2=25, int y2=80,

 int color=7);                                                // Prototype

  void main ( void )

 {

 drawbox(10,1,25,80,14); // parameters passed

 drawbox();   // uses default arguments        

}     

void drawbox( int x1, int y1, int x2, int y2,

          int color)

{

// Body of the function

                   }

 Function drawbox() draws a box around the edges of the coordinates passed as parameters. If these parameters are omitted, then the default values, as given in the declaration are passed.